$8-\frac{4}{5}x\ge16$

$\int\left(xsin\left(21x\right)\right)dx$

$\int\sqrt{\left(1-x^2\right)}\cdot dx$

$\sqrt[3]{5^9}+\sqrt[8]{16^4}$

$\left(8-5b\right)^2$

$\sin\left(\frac{3\pi}{5}\right)\cos\left(\frac{\pi}{15}\right)+\cos\left(\frac{3\pi}{5}\right)\sin\left(\frac{\pi}{15}\right)$

$\int\left(5x^2\right)\cdot e^{2x-5}dx$